modernc.org/ccgo/v3@v3.16.14/lib/testdata/gcc-9.1.0/gcc/testsuite/gcc.c-torture/execute/pr19449.c (about)

     1  /* PR c/19449 */
     2  
     3  extern void abort (void);
     4  
     5  int y;
     6  int z = __builtin_choose_expr (!__builtin_constant_p (y), 3, 4);
     7  
     8  int
     9  foo (int x)
    10  {
    11    return __builtin_choose_expr (!__builtin_constant_p (x), 3, y++);
    12  }
    13  
    14  int
    15  main ()
    16  {
    17    if (y || z != 3 || foo (4) != 3)
    18      abort ();
    19    return 0;
    20  }